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Related Experiment Video

Updated: Jun 14, 2026

Artificial Antigen Presenting Cell (aAPC) Mediated Activation and Expansion of Natural Killer T Cells

Artificial Antigen Presenting Cell (aAPC) Mediated Activation and Expansion of Natural Killer T Cells

Published on: December 29, 2012

Human prostasomes express CD48 and interfere with NK cell function.

R Tarazona¹, E Delgado, M C Guarnizo

¹University of Extremadura, Immunology Unit, Cáceres, Spain.

|April 13, 2010

Summary

This summary is machine-generated.

Prostasomes, secreted by the prostate, enhance sperm function and protect against immune attack. They reduce NK cell activity, potentially preventing immune-mediated sperm destruction in the female reproductive tract.

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Published on: December 29, 2012

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Published on: May 6, 2019

Area of Science:

Reproductive Immunology
Cellular Biology
Urology

Background:

Prostasomes are prostate-secreted vesicles crucial for male fertility and sperm protection.
The female reproductive tract contains Natural Killer (NK) cells, part of the innate immune system.
Prostasomes may play a role in immune modulation within the female reproductive tract.

Purpose of the Study:

To investigate the role of prostasomes in regulating NK cell activity.
To determine if prostasomes can modulate the immune environment of the female reproductive tract.

Main Methods:

Flow cytometry was used to analyze prostasome-sperm interactions.
NK cell activity was measured in the presence of purified prostasomes.

Main Results:

Prostasomes express CD48, a ligand for the activating receptor CD244 on NK cells.
Interaction with prostasomes decreased CD244 expression on NK cells.
Prostasomes reduced NK cell activity.

Conclusions:

Prostasomes may immunomodulate the female reproductive tract by downregulating NK cell activity.
This immunomodulation could prevent immune-mediated sperm destruction and enhance sperm survival.